Dr. William Bayer, MD

Internal Medicine ·  Male · Age 58

  28 Reviews
  

Dr. William Bayer, MD is an internal medicine specialist in Carol Stream, IL and has been practicing for 33 years. He specializes in internal medicine.


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Dr. Bayer's Reviews

Likelihood to recommend Dr. Bayer

3.5

Based on 28 reviews

5 Stars
60.714285714285715%
(17)
4 Stars
0%
(0)
3 Stars
3.5714285714285716%
(1)
2 Stars
3.5714285714285716%
(1)
1 Star
32.142857142857146%
(9)

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Average Reported Wait Time
  • 10 – 15 minutes
Dr. Bayer's Performance
  • Trustworthiness
  • Explains condition(s) well
  • Answers questions
  • Time well spent
Office & Staff Performance
  • Scheduling
  • Office environment
  • Staff friendliness
What People Say About Dr. William Bayer, MD
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Dr. Bayer is an excellent and outstanding Endocrinologist. I have been seeing him for over 20 years. He's very thorough and explains things to you. He takes his time and listens to you. He's very friendly and he has a great sense of humor. He's the best Endocrinologist around and I would recommend him to anyone!!! ?
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Dr. Bayer has always listened to my symptoms, not just bloodwork results. When the tests he ran came back normal, but my symtpoms said otherwise, he ran more tests until he figured out what was wrong. When my prognosis wasn't great, he personally called me to go over the results and then followed up with a second phone call a week later to see if I had any new questions since our first conversation.
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Dr. Bayer is a Diabetic Endocrinologist that I have complete trust in has really turned my A1C Goal/Goals to the Positive. He is very knowledgeable in his field and he always spends appropriate time w/patient/patients. I will be 62 in December and have been battling Diabetes since 1999/2000. He has also been a big influence on how I feel about my condition-always Positive. He has my Thanks! Bryan Compton
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Do not take the bad reviews seriously! Dr. Bayeris amazing & caring! So, if you need a really good doctor that cares about your health & does not set a timer when you walk in, he is your answer to getting your health back on track! I came to him when there was no one else. He cared & I am now on my way to not only answers but resolutions. He has a good heart & is a briliant doctor! If you are serious about working on your health & learning how to be healthier but need a coach; he is for you!
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Dr Bayer is a no-nonsense doctor that is very knowledgable and thoruough. I have gone to him for many years before a car accident and am now able to see him again. I could not find his phone number so I looked it up. As I read the reveiws that were positive, I could relate. As I read the negative reviews I wondered what could have gone wrong. I made my appointment a little concerned. Well, I can only say that Dr. Bayer is still the caring wonderful doctor that I remember.
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He needs to retire. He's clearly mad at everything, he was 30 minutes late to an 8:00 am meeting and told me out of the gate he already didn't know what to do. He took no time to listen and understand. he's terrible, go somewhere else
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One of the worst doctors I have ever seen. Rude, disrespectful, and just plain mean. He doesn't care about patients and this was shown by his horrible bedside manner. He needs training on how to be nice to people.
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Dr. Bayer is so nice. He listens and is excited when he sees me progressing in my health. Worked consistently to get my thyroid medication to the appropriate level.
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Rude bedside manner, rushes through, and was annoyed when I had to mention multiple health issues. He really seems to hate his job. Probably competent with thyroid issues but just too rude and unhappy!
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Dr Bayer acted like a robot. Dr Bayer made eye contact 5 seconds during the entire appointment. He spent all his time filling out forms on his computer instead of listening to any concerns I had. His bedside manner is horrible, he is extremely unwilling to entertain other professional opinions. He was very concerned about if insurance will cover instead of the care of the patient, save yourself the frustration find a different doctor who cares about your health & issues.
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Dr. Bayer accepts

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(630) 326-4436

Dr. Bayer accepts the following insurance:

Aetna
Aetna EPO
Aetna POS
Aetna PPO
Managed Choice POS
Open Choice PPO
Blue Cross Blue Shield of Illinois
Blue Advantage
Blue Cross Blue Shield of Illinois HMO
Blue Cross Blue Shield of Illinois PPO
Blue Precision HMO
Cigna
Great West Healthcare-Cigna HMO
Great West Healthcare-Cigna POS
Great West Healthcare-Cigna PPO
Cigna-HealthSpring
CorVel
Worker's Compensation WC
Coventry Health Care
Coventry Health Care HMO
Coventry Health Care POS
Coventry Health Care PPO
First Health (Coventry Health Care)
HealthLink
HealthLink HMO
HealthLink POS
HealthLink PPO
HFN
HFN PPO
Worker's Compensation WC
Humana
Choice
Choice Care
Choice PPO
Humana HMO
Humana POS
Humana PPO
LifeSynch
Behavioral Health
Medicaid
MultiPlan
MultiPlan PPO
PHCS Network PPO
UniCare
UniCare HMO
UniCare POS
UniCare PPO
UnitedHealthCare
Choice
Choice Plus
United Behavioral Health
United Healthcare EPO
United Healthcare HMO
United Healthcare POS
United Healthcare PPO
Viant

Background Check

No malpractice claims found for Illinois
No disciplinary actions found for the years we collect data
No board actions found for the years we collect data
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Experience Check

Check if Dr. Bayer treats your condition or procedure

Dr. Bayer's conditions and procedures:

  • Abnormal Thyroid
  • Acromegaly and Gigantism
  • Adrenal Gland Diseases
  • Adrenal Incidentaloma
  • Adrenal Insufficiency
  • Autoimmune Diseases
  • Autoimmune Thyroid Diseases
  • Benign Tumor
  • Bone Disorders
  • Breast Diseases
  • Calcium Metabolism Disorders
  • Cancer
  • Congenital Adrenal Hyperplasia (CAH)
  • Continuous Glucose Monitoring
  • Cushing's Syndrome
  • Diabetes Counseling
  • Diabetes Insipidus
  • Diabetes Mellitus, Secondary
  • Diabetes Type 1
  • Diabetes Type 2
  • Diabetes With Renal Manifestations
  • Diabetic Ketoacidosis
  • Female Infertility
  • Gestational Diabetes
  • Goiter
  • Graves' Disease
  • Growth Hormone Deficiency
  • Gynecomastia
  • Hashimoto's Disease
  • Hypercalcemia
  • Hyperkalemia
  • Hyperlipidemia
  • Hyperparathyroidism
  • Hyperthyroidism
  • Hypoglycemia
  • Hypokalemia
  • Hypoparathyroidism
  • Hypopituitarism
  • Hyposmolality and Hyponatremia
  • Hypothyroidism
  • Kidney Disease
  • Lipid Disorders
  • Malaise and Fatigue
  • Menstrual Disorders (incl. Dysmenorrhea)
  • Multiple Endocrine Neoplasia
  • Obesity
  • Osteopenia
  • Osteoporosis
  • Overweight
  • Pregestational Diabetes Mellitus
  • Pregnancy-Related Disorders
  • Symptomatic Menopause
  • Testicular Dysfunction
  • Thyroid Cancer
  • Thyroid Cyst
  • Thyroid Disease
  • Thyroiditis
  • Vitamin D Deficiency

About Me

Care Philosophy

"Better people means better experiences. Our care team is committed to delivering results that change lives." 

Specialties

  • Internal Medicine

Board Certifications

  • Diabetes, Metabolism & Endocrinology
  • Internal Medicine

Education

Loyola University Medical Center
Fellowship Hospital
Loyola University Medical Center
Residency Hospital
Loyola University Medical Center
Internship Hospital
1986
Loyola University of Chicago / Stritch School of Medicine
Medical School
1986

Awards

Affiliated Hospitals

Check the quality of care at hospitals where Dr. Bayer treats patients.

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84% Patient experience rating, 15% higher than the national average

  • Outstanding Patient Experience Award™ (2019, 2018, 2017)